Creates a 3D polyline from a list of `[x, y, z]`

coordinates. As the name says, it uses the built-in hull operation
for each pair of points (created by the `sphere`

module). It's slow. However, it can be used to create metallic
effects for a small `$fn`

, large `$fa`

or `$fs`

.

## Parameters

`points`

: The list of`[x, y, z]`

points of the polyline. The points are indexed from 0 to n-1.`thickness`

: The line thickness.`$fa`

,`$fs`

,`$fn`

: Check the sphere module for more details.

## Examples

```
include <hull_polyline3d.scad>;
hull_polyline3d(
points = [
[1, 2, 3],
[4, -5, -6],
[-1, -3, -5],
[0, 0, 0]
],
thickness = 1,
$fn = 3
);
```

```
include <hull_polyline3d.scad>;
r = 50;
points = [
for(a = [0:180])
[
r * cos(-90 + a) * cos(a),
r * cos(-90 + a) * sin(a),
r * sin(-90 + a)
]
];
for(i = [0:7]) {
rotate(45 * i)
hull_polyline3d(points, 2, $fn = 3);
}
```